I got enough of that reminder and upgraded to catalina. after this was done I could not ise microsoft office, to which I have a license key. An "update" to off

I got enough of that reminder and upgraded to catalina. after this was done I could not ise microsoft office, to which I have a license key. An "update" to office 365 was promted, to which I also accepted .... turns out office 365 is a subscription based product. as a user with some knowledge of open source alternatives I dont see why these two corporations are lowering the incentive for me to keep using their products, at one point it will just be easier to boot something like manjaro or ubuntu from the hardware and get rid of reminders and subscription offers. I am actually open for HN users suggestions for an OS replacement for an MBP from late 2013